Cynthia, Jeff: my wife and I did the PinhÃ£o-Provesende trail last week. It is called the "Trilho de S. CristovÃ£o", and is well marked in both directions. Especially the first part (if you start in PinhÃ£o) is a rather steep climb, but after that it is a relatively comfortably walk. I guess it will take you 1,5 - 2 hours to do it one way. We split it up in two, because I had to carry our one year old boy on my back. So we walked from PinhÃ£o to Quinta do Junco and back the first day and from Provesende to Junco and back the second day. The walk through the vineyards of Quinta do Junco (which itself isn't more than a ruin) is incredibly beautiful, and you'll have great views to a number of famous quintas, including Terra Feita, Noval, Eira Velha and Cavadinha.

Ronnie, thanks for this. I was in PinhÃ£o a week or two ago and asked again - there are no maps, but as you say it is well marked. I took photos of the bill-board alongside the kiosk outside the train station, but all information is in Portuguese, and it's not really directions. And I was wrong - it's not 15 but 5 km - probably just feels like 15 with the hills - and a toddler on your back! Well done you! I am hoping to get up there soon - if I can work around the train strikes!